When you have a face-to face conversation, it is imperative you look them in the eye. This conversation will be interpreted as showing interest, paying attention, sincerity and a sign of self-confidence. It has been said, eye contact is a direct link to your emotions. If you are shy, cocky, aggressive or uncomfortable with this conversation, your client will feel this.
In conversations, you always want to look the other person in the eye, to let them know what you say is what you mean, and also the truth. If you do not, refusing to make eye contact may be interpreted as weakness, disinterested, dishonest or even disrespectful. Staring directly into their eyes for long period of time, may creep out the other person, so a good idea to look away for brief moments.
Mirroring the facial expressions of the person talking (like showing concern or smiling) also helps to support appropriate eye contact. A frozen stance and tense face seems more like staring than contact.
You should leave a client believing you told the truth, and feel self-confident as they look back on a conversation. Remember, first impression are lasting impressions! If you only have 15 minutes - make those 15 minutes the best you can!